The USB type endpoint 0 8-bit register (USBTYPE0) must be written with the operating speed of the targeted Device being communicated with using endpoint 0.
USBTYPE0 is shown in Figure 22-39 and described in Table 22-41.
Figure 22-39 USB Type Endpoint 0 Register (USBTYPE0)
LEGEND: R/W = Read/Write; R = Read only; -n =
value after reset |
Table 22-41 USB Type Endpoint 0 Register (USBTYPE0) Field DescriptionsBit | Field | Value | Description |
---|
7-6 | SPEED | 0 | Operating Speed specifies the operating speed of the target Device. If selected, the target is assumed to have the same connection speed as the USB controller. |
0-1h | Reserved |
2h | Full |
3h | Low |
5-0 | Reserved | 0 | Reserved |